Snap-switch.



J. H. WYATT.

SNAP SWITCH. APPLIGATION FILED OUT. 22, 1908.

Patented May 11, 1909.

\l I H516 3 FIG. 7

| I I I 1 WITNESSES 7 5% Airman.

U ITED s rnrizs rn rnn'r OFFICE JAMES H. WYATT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGN OR TO WILLIAM M. SCOTT, OF

- PHILADELPHIA, PENNSYLVANIA.

SNAP-SWITCH.

of which the f0 owing is a specification.

My invention .relates to an electrical switch, and more particularly to a snap switch of the type to be operated by pqs button or the like.

My invention relates to switch of the type described in my applica tion Serial N 0. 429,608, filed April 28, 1908, and resides in an improvement upon or. modificatio 11' i f the-switch ofmy said prior application. 7

For an illustration of one of the forms my invention may take, reference is to be had to the accompanying drawing, in which:

Figure 1 is a vertical sectionalviewthrough the cover andswitch box, the switch parts being shown in elevation. Fig. 2 is a side elevation of the switch mechanism isolated, switch contacts being omitted and parts cut away for the sake of clearness. ,Fig. 3 is a vertical elevational view looking at the side of the mechanism shown in Fig. 2. -Fig. 4

is an end elevational view. of the button arm or spring winding member. Fig. 5 is a plan view of the same. Fig. 6 is a side elevation al view of the same. Fig. 7 is a front elevational view of the detent or latch member. Fig. 8 is an edge View of the same. Fig. 9 is an edge view of aportion of one switch spindle or pivot supports. Fig. 10 is a front view of the same.

Referring to the drawing, B is a receptacle or casing of insulating material, such as molded porcelain, adapted to contain and surround the switch contacts and switch mechanism.v Upon the top ofthe receptacle B is secured the baseplate 1' from which is supported the entire switch mechanism, with the exception of the stationarycontacts. 'A finishing plate 2 is secured to the base plate 1.

Through apertures in the base plate 1 and the finishing plate 2 extend the two-push buttons 3 and 4, mounted res ectively upon the vertically disposedmeta ic members 5 Specification of Letters Patent. Application filed October 22, 1908. Serial No. 458,919.

a two button snap horizontal 0f the.

spindle 13, the

Patented May 11,1909.

I and 6. The member 6 is pivoted at 7 to the 2 arm 8 of the spring winding member 9. The

other button member 5 is ivoted at 10 to the other end of the arm 8 o the spring winding member. i

1 Extending downwardly from the under side of the base plate 1 and secured to or'integral therewith, and disposed between the two buttons 3 and 4, are the two switch supporting members 11 and 12. Extending llOllZOIltally, between the supporting members 11 and 12 approximate their lower ends, and mounted 1n them, is-the switchsupporting pivot or s indle 13. The button arm or spring win in'g member 9'has secured thereto a bushing 14, as shown in Fig. 6, through which the spindle or shaft 13 passes. A coiled s ring 15 surrounds the bushing 14-, while tiie ends 16 of such s ring extend downwardly one on each side of the horizontal lug or projection 17 formed on the spring winding member 9. These ends 16 of the coiled spring 15 also engage or straddle thev portion 18 of the contact carrying member having the end portions 19, 19 pivoted upon the spindle or shaft 1.3 and adapted to have secured thereto, but insulated therefrom, the movable switch contacts.

The lug or projection 17 on the spring winding member extends substantially parallel with the portion 15' of the contact carrying member, as seen in Fig. 3, the lug 17 intervening between the spindle 13 and the portion 18 of the contact carrying member, and its outer end extendinginto the path of the ears or lugs 22 of the detent member 23 hereafter described.

To the left of the spring shaft 13, is 'a second coiled spring 20 whose two ends 21, 21 engage upon the tops of the lugs or ears-22, 22 of the detent or latch member 23, the latter shown isolated in Figs. 7

and 8. This detent or latchmeniber 23 has an elongated aperture 24 which loosely em- Winding member- 9, as viewed in Fig. 3, and surrounding the braces abushmg carried on the pivot or] .detent member 23 being by is means ca ablev of rotation upon the bushin and a'biia to reciprocate radially rela-' tively t ereto. In its lower side the detent member 23 has a notch 25 adapted to embrace the portion 18 of the contactcarryin member, so that the detent member 23 anc thus Iorming shoulders 28, 28. The spring 20 is so tensioned that its ends 21, 21, engaging upon the tops of the ears 22, 22, tend to depress and hold depressed the entire detent or atch member 23.

Upon the switch su porting member 11 is a lug 29, either struc up from the body of the material of the member 11, or consisting of. an independent piece secured thereon, such lug 29 being of a height or thickness in a direction radial to the spindle 13 as to freely pass through the slot 27, and of a Width to allow its engaging in either of the notches 26, 26 of the detent member 23.

' The stationary switch contacts are shown in Fi 1 at 30 and 31, mechanically and elec trically secured to the posts 32 fastened in recesses in the receptacle B by screws Upon the tops of the posts 32, 32 are the binding screws 34 to receive and secure the circuit wires. Cooperating with th stationary switch contacts 30 and 31 are the movable switch contacts 35 and 36, secured at 37, 37 by eyelets, rivets or the like, suitable insulating material intervening, to the end heads 19 of the contact carrying mem ber 18.

The operation 18 as follows: With the parts in open circuit position, to close circuit the operator depresses button 3. When it has been depressed to the position shown m Fig. 2, the parts are aboutto snap to circuit closing position As the operator begins to depress the button 3 the arm 8, ofthe spring winding member9, is rotated in a counterclockwise direction, as viewed in Fig. 2, thus winding up the spring 15 whose one end 16 is carried around by the spring winding member and whose, other member is held a ainst the contact carrying member 18, the latter being held locked by the detent or latch plate 23 having the lug 29 on the switch supporting member 11 engaging in one of its notches.

.As the depression of the button 3 continues and the tension on the spring 15isprogressively increased, the lug or projection 17 on the springwinding member 9, which serves to engage the end of the spring to wind the same, engages the under side of an ear or lug 22 of the latch plate 23 to actuate the same in opposition to the spring 20 which tends to hold the latch or detent member 23 depressed. This engagement of the ear or lug 22 by the projection or lug 17 of the spring winding member doesnot occur, however, until practically the end of the button movement or spring winding movement. Then, when the detent member 23 is so lifted the notch 26 re cedes from the lug 29, and the engagement between the lug 29 and the shoulder 28 ceases, and the detent me=nber 23 and the contact carrying member 18 are snapped to circuit closing position, by a rotary movement, the slot 27 in the detent member 23 allowing the movement over or past the lug At the end of such movement, the spring 20 again depresses the detent member 23, so that the lug 29 now engages in the other notch 26. To limit the angular travel of the contact carrying n'iember, the switch supporting member 11 .is provided with shoulders 37 between which the oscillation of the contact carrying member occurs.

For reverse operation, the button 4 is depressed and the same cycle of oscillations is repeated, the contacts snapping to open circult position.

What I claim is:

1. In a snap switch, the combination with a pivoted contact carrying member, of a detentmember engaging and rotating nith the same, ears upon said detent member, a coiled spring having its ends engaging said ears to hold said detent member depressed, an operating spring, a spring winding member, and a projection on said spring winding member for engaging said operating spring and for .en a 111 said ears n on said dotent member to shift the same.

2. In a snap switch, the combination with a pivoted contact carrying member, of a dctent member engaging and rotating with the same, ears upon said detent nu-niber, a spring engaging said ears to hold. said dctent nicmher in normal position, an operating spring, a spring inding member, and a projection on said spring wind ng membordispiist'u i bet ween said contact carrying member and its axis of movement for engaging said ears upon said detent member to shift the same.

3. .ln a snap switch, the combination with a pivoted contact carrying member, oi an operating spring, a spring ninding member. a detentmember engaging said Contact car-- rying member and adapted to rotate thororrith, ears upon said doteni member, a spring engaging said ears to hold said. dctvnt meniher depressed, a fixed member, a lug thereon, notches in said detent member adapted to receive said. lug, and means on said spring \iinding member for actuating said dotent member to release said contact ca rryin g memher.

llo

lug to engage in a notch, an nperating spring, 1 fixed my signature in the presence hi the two a spring wmding nember, and a PI'QJBCUOII subscrlblng witnesses.

on said spring winding member for engaging 1 i said operating spring and for engaging said JAMEb YAT'I ears upon smd detent member to shift the same.

In t .-stinmnv whereof I have hereunto af- Witnesses:

ANNA E. STEINBOOK, DANIEL WEBSTER, Jr. 

